CVE-2026-44375
High · 7.5CVSS
7.5
EPSS
0.6%
Published
May 14, 2026
CISA due date
—
The record
Nerdbank.MessagePack is a NativeAOT-compatible MessagePack serialization library. Prior to 1.1.62, Nerdbank.MessagePack contains an uncontrolled stack allocation vulnerability in DateTime decoding. A malicious MessagePack payload can declare an oversized timestamp extension length, causing the reader to allocate an attacker-controlled number of bytes on the stack. This can trigger a StackOverflowException, which is not catchable by user code and terminates the process. This vulnerability is fixed in 1.1.62.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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